![](https://rs.olm.vn/images/avt/0.png?1311)
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(=5\left(\dfrac{5}{1\cdot6}+\dfrac{5}{6\cdot11}+...+\dfrac{5}{101\cdot106}\right)\\ =5\left(1-\dfrac{1}{6}+\dfrac{1}{6}-\dfrac{1}{11}+...+\dfrac{1}{101}-\dfrac{1}{106}\right)\\ =5\left(1-\dfrac{1}{106}\right)=5\cdot\dfrac{105}{106}=\dfrac{525}{106}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
(-52).58+43.(-52)+52
=52.(-58)+(-43).52+52
=52.[(-58)+(-43)+1]
=52.(-100)
=-5200
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
52+52+52+52+52+...+52 +25+25+25+25+25+25...+25
=(52x 75)+(25x 52)
=3900+1300
=5200
chúc bạn học tốt !
Ta có : 52 + 52 + 52 +...+ 52 + 25 + 25 + ....+ 25
= 75 . 52 + 52 . 25
= 52 . ( 75 + 25 )
= 52 . 100
= 5200
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\left(x-52\right)-62=52\)
\(\Rightarrow x-52=52+62\)
\(\Rightarrow x-52=114\)
\(\Rightarrow x=114+52\)
\(\Rightarrow x=166\)
![](https://rs.olm.vn/images/avt/0.png?1311)
(-52).66+(-52).34
=(-52). (66+34)
= (-52).100
= -5200
![](https://rs.olm.vn/images/avt/0.png?1311)